JPS56146309A - Power booster - Google Patents

Power booster

Info

Publication number
JPS56146309A
JPS56146309A JP4934280A JP4934280A JPS56146309A JP S56146309 A JPS56146309 A JP S56146309A JP 4934280 A JP4934280 A JP 4934280A JP 4934280 A JP4934280 A JP 4934280A JP S56146309 A JPS56146309 A JP S56146309A
Authority
JP
Japan
Prior art keywords
output
amplifier
speaker
phase
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4934280A
Other languages
Japanese (ja)
Inventor
Masao Igarashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4934280A priority Critical patent/JPS56146309A/en
Publication of JPS56146309A publication Critical patent/JPS56146309A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To suppress the distortion voltage of a speaker cord, by giving a feedback amplification to the output of an amplifier of the power booster unit via the second amplifier and then producing a double output in the adverse phase to the output of a power amplifier. CONSTITUTION:The input signal of the input terminal IN1 is amplified by the power amplifying unit 11, and the output signal supplied through the output terminal OUT1 is applied to the positive-phase input terminal (+) of the speaker SP. At the same time, said output signal is supplied to the input terminal IN2 of the power booster unit 12 and then applied to the adverse-phase input terminal (-) of the SP through the output terminal OUT2 via an operational amplifier G2. Thus the speaker Sp receives a balanced transless (BTL) driving. The voltage of terminal OUT2 is applied to the amplifier G2 via the positive-phase amplification of the operational amplifier G3. As a result, a double voltage of an adverse phase to the output signal of the terminal OUT1 is added. Thus the impedance of the side of the unit 11 viewed from the speaker SP becomes close to zero. Then the distortion voltage that is caused by using a speaker cord can be suppressed.
JP4934280A 1980-04-15 1980-04-15 Power booster Pending JPS56146309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4934280A JPS56146309A (en) 1980-04-15 1980-04-15 Power booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4934280A JPS56146309A (en) 1980-04-15 1980-04-15 Power booster

Publications (1)

Publication Number Publication Date
JPS56146309A true JPS56146309A (en) 1981-11-13

Family

ID=12828321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4934280A Pending JPS56146309A (en) 1980-04-15 1980-04-15 Power booster

Country Status (1)

Country Link
JP (1) JPS56146309A (en)

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